Grade Sync Pro vs SlabFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grade Sync Pro
This AI-powered tool helps trading card enthusiasts identify, analyze, and estimate the condition of collectible cards. It provides detailed grading analysis, centering tools, and market price insights to assist collectors and investors.
- AI card identification
- AI grading analysis
- Advanced centering tool
- PSA submission preparation
- Market price insights
- Personal card inventory
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Scan a card. Know if it’s worth PSA before you pay $60 and wait five months. AI estimate plus centering (left/right, top/bottom) for Pokémon and sports. Not an official grade. Build the list, track the order, same account on iPhone and web. AI Card Identification Simply take a photo of your card and Grade Sync Pro will instantly identify: • Card name • Set and series • Year • Rarity • Player or Pokémon • Card references and details No manual searching required. AI Card Grading Analysis Our AI evaluates your card using professional grading factors similar to PSA and Beckett. Get instant analysis of: • Centering • Corners • Edges • Surface • Overall estimated grade Know whether your card is worth grading before submitting it. Advanced Centering Tool Grade Sync Pro includes professional centering analysis: • Top / Bottom ratio • Left / Right ratio • Grading estimate alignment PSA Submission Preparation Prepare grading submissions in minutes. Grade Sync Pro helps you: • Build submission lists • Track grading status • Manage bulk card submissions • Export submission data Collectors can prepare hundreds of cards quickly. Market Price Insights Evaluate card value using recent market sales data. See estimated value ranges based on recent transactions. Perfect for collectors and investors. Personal Card Inventory Track your graded cards in one place. Store: • Certification numbers • Card images • Grade details • Collection value Manage your entire collection easily. Built for the Hobby Grade Sync Pro is designed for: • Pokémon collectors • Sports card collectors • Hobby shops If you collect trading cards, Grade Sync Pro gives you professional tools to evaluate and manage your collection. Start scanning your cards today and discover the power of AI grading. Privacy Policy URL and ensure https://gsp.cards/privacy Terms of Use (EULA) —Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Card investors • Bulk submitters This helps collectors determine whether a card can achieve PSA 10 or higher.
SlabFlow
Manage your trading card inventory, sales, and grading estimates all in one place. Track card costs, view sold comparables, and generate profit reports. Sync listings with eBay and manage team sales with advanced plans.
- Card inventory tracking
- AI grading estimates
- Sales and profit reporting
- eBay listing sync
- Team management features
- Cost basis tracking
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SlabFlow is inventory, selling and grading for trading card sellers, in one app. • Track every card with its cost basis, photos and sold-comp values • Grade estimates from your card photos: centering, corners, edges and surface • Snap a card to add it • See your sales, profit and reports (P&L, turnover, ROI) • Manage listings and sync your eBay sales • Run a shop with staff and roles (Team plan) Plans: Starter, Pro and Team, billed through your Apple account. Some features need Pro or Team. Terms of Use: https://www.slabflowai.com/terms
Screenshots
Verdict
The clearest difference is update cadence: SlabFlow at every 10 days against Grade Sync Pro's every 3 weeks. SlabFlow also leads on iOS requirement (15.0 vs 18.0). On price, rating, review sentiment and ratings volume there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Grade Sync Pro sells 1 in-app purchase, starting at $24.99 per month and SlabFlow sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Grade Sync Pro against 5.0 for SlabFlow. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Grade Sync Pro ships an update every 3 weeks, SlabFlow every 10 days. The most recent releases landed on October 9, 2026 and October 31, 2026 respectively.
| Parameter | Grade Sync Pro | SlabFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 3 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Mario Miron | Aaron Parasiliti |
Customer experience
Grade Sync Pro
SlabFlow
In-app purchases
Grade Sync Pro
- GSP Pro Monthly3 Days trial$24.991 Month
SlabFlow
- SnapSlab Pro Monthly$4.991 Month
- SnapSlab Pro Yearly$34.991 Year









